A test droplet control method based on surface characteristics

Abstract

The present invention relates to the field of contact angle measurement technology, and specifically to a test droplet control method based on surface features, a computer-readable storage medium, and a computer program product; the test droplet control method based on surface features provided by the present invention comprises the following steps: obtaining a side view of a target surface, and extracting a contour curve of the target surface in the side view; obtaining the surface features of the target surface at the test droplet landing point based on the contour curve; obtaining a target injection volume range of the test droplet according to the surface features; and controlling the actual injection volume of the test droplet according to the target injection volume range. The present invention adjusts the injection volume range of the test droplet by using the surface features at the test droplet landing point on the contour curve of the target surface, thereby realizing dynamic adjustment of the test droplet injection volume to adapt to different surface features, thereby overcoming the inconsistency problem caused by the traditional test droplet control method using the same volume of test droplets for contact angle measurement.

Description

Technical Field

[0001] The invention relates to the technical field of contact angle measurement, and in particular to a test droplet control method based on surface features, a computer-readable storage medium and a computer program product. Background Art

[0002] Contact angle measurement is a key technology for evaluating the wettability and hydrophilicity of material surfaces in fields such as materials science, surface engineering, and biomedicine. However, traditional test droplet control methods usually use the same test droplet size for different types of surfaces and fail to adjust according to surface features (such as surface area and surface curvature), which affects the accuracy and consistency of the measurement results.

[0003] For example, on a surface with a large curvature, the test droplet shape will change due to the effects of gravity and surface tension, making it easier for the test droplet to roll or deform, affecting the accuracy of the contact angle measurement. In addition, the spreading behavior of the test droplet will also be different on flat surfaces with different surface areas, and the traditional method cannot be adjusted according to the size of the surface area, resulting in inconsistent measurement results and significant limitations. Summary of the invention

[0004] The present invention provides a test droplet control method based on surface features, a computer-readable storage medium and a computer program product, which are intended to reduce the instability of the test droplet volume or measurement error caused by surface differences during contact angle measurement, and ensure the accuracy and consistency of the test droplet injection.

[0005] In one embodiment of the present invention, a test droplet control method based on surface features is provided, comprising the following steps:

[0006] Acquire a side view of the target surface, and extract a contour curve of the target surface in the side view;

[0007] Based on the contour curve, obtaining the surface characteristics of the target surface at the landing point of the test droplet;

[0008] According to the surface characteristics, a target injection volume range of the test droplet is obtained;

[0009] According to the target injection volume range, the actual injection volume of the test droplet is controlled.

[0010] In this embodiment or other embodiments, the surface features include:

[0011] The angle between the tangent line of the profile curve at the location where the test liquid drop falls and the horizontal plane.

[0012] In this embodiment or other embodiments, obtaining a target injection volume range of a test droplet according to the surface features comprises the following steps:

[0013] According to the size of the included angle, a first adjustment amount of the target injection volume is obtained, and the first adjustment amount satisfies the following calculation model: ,in, represents the first adjustment amount, represents the first adjustment coefficient, It represents the angle between the tangent line of the profile curve at the location where the test droplet falls and the horizontal plane;

[0014] Based on the first adjustment amount, a first target injection volume range of the test droplet is obtained, wherein the first target injection volume range is ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the first adjustment amount.

[0015] In this embodiment or other embodiments, the surface features include:

[0016] The curvature of the profile curve at the location where the test liquid drop falls.

[0017] In this embodiment or other embodiments, obtaining a target injection volume range of a test droplet according to the surface features comprises the following steps:

[0018] According to the size of the curvature, the first and second adjustment amounts of the target injection volume are obtained, and the first and second adjustment amounts satisfy the following calculation model: ,in, represents the first and second adjustment amounts, represents the first and second adjustment coefficients, It represents the curvature of the profile curve at the location where the test droplet lands;

[0019] Based on the first and second adjustment amounts, the first and second target injection volume ranges of the test droplet are obtained. The first and second target injection volume ranges are: ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the second adjustment amount.

[0020] In this embodiment or other embodiments, the surface features further include:

[0021] The test droplet has a contactable length on the contour curve, and the slope difference or curvature difference between any two points on the contour curve within the contactable length does not exceed the corresponding set threshold.

[0022] In this embodiment or other embodiments, obtaining the target injection volume range of the test droplet according to the surface features further includes the following steps:

[0023] According to the contactable length, a second adjustment amount of the target injection volume is obtained, and the second adjustment amount satisfies the following calculation model: ,in, represents the second adjustment amount, represents the second adjustment coefficient, represents the accessible length of the test droplet on the contour curve, Indicates the accessible length threshold;

[0024] The third target injection volume range of the test droplet is obtained by combining the first adjustment amount and the second adjustment amount, wherein the first adjustment amount is the first-first adjustment amount or the first-second adjustment amount.

[0025] In this embodiment or other embodiments, the step of combining the first adjustment amount and the second adjustment amount to obtain a third target injection volume range of the test droplet includes the following steps:

[0026] Based on the first adjustment amount, obtaining an adjusted first target injection volume range;

[0027] Based on the second adjustment amount, obtaining an adjusted second target injection volume range;

[0028] The intersection of the first target injection volume range and the second target injection volume range is set as the third target injection volume range of the test droplet. The third target injection volume range is ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, represents the first adjustment amount, represents the first and second adjustment amounts, express and The minimum value in .

[0029] Based on the surface feature-based test droplet control method proposed in the above-mentioned embodiments, a computer-readable storage medium is proposed in this embodiment or other embodiments, and the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the surface feature-based test droplet control method.

[0030] Based on the surface feature-based test droplet control method proposed in the above embodiments, a computer program product is proposed in this embodiment or other embodiments, including a computer program, which implements the surface feature-based test droplet control method when executed by a processor.

[0031] The test droplet control method based on surface features, computer-readable storage medium and computer program product provided by the present invention have the following benefits:

[0032] The present invention obtains the contour curve of the target surface, extracts the surface features of the test droplet landing point based on the contour curve, and then adjusts the injection volume range of the test droplet according to the surface features, thereby realizing dynamic adjustment of the test droplet injection volume, so that the test droplet can adapt to different surface features, and overcomes the inconsistency problem caused by the traditional test droplet control method using the same volume of test droplets to measure the contact angles of different surfaces;

[0033] Furthermore, the surface feature-based test droplet control method provided by the present invention is combined with computer technology to use a computer program to perform real-time calculations on target surface features, and adjust the test droplet injection volume through an automated control system, so that the control of the test droplet volume is more accurate and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a test droplet control method based on surface features provided by an embodiment of the present invention;

[0035] Figure 2 A side view of a target surface and a schematic diagram of its contour curve provided for this embodiment;

[0036] Figure 3 This is a schematic diagram of an example of the angle between the tangent line of the target surface contour curve at the test droplet landing position and the horizontal plane provided in this embodiment. DETAILED DESCRIPTION

[0037] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures and technologies are provided to facilitate a thorough understanding of the embodiments of the present application.

[0038] However, it should be clear to those skilled in the art that the present application can be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.

[0039] In one embodiment provided by the present invention, see Figure 1 , Figure 1 This is a flow chart of a test droplet control method based on surface features provided in an embodiment of the present invention.

[0040] like Figure 1 As shown, the test droplet control method based on surface features provided in this embodiment is controlled based on the test droplet before contact angle measurement through the following steps:

[0041] S01. Obtain a side view of a target surface, and extract a contour curve of the target surface in the side view.

[0042] Furthermore, the side view of the target surface can be obtained by a camera, an optical scanner or other device; further, the side view is processed by relevant image processing techniques, such as denoising, contrast enhancement, edge detection, etc., so as to obtain a contour curve of the target surface in the side view.

[0043] It should be noted that the side view obtained in step S01 is a two-dimensional plane view, which is a "section" image of the target surface observed from a specific angle, and usually presents a geometric shape on a plane.

[0044] In a specific embodiment, see Figure 2 , Figure 2 A side view of a target surface and a schematic diagram of its contour curve are provided for this embodiment. Figure 2 The target surface in Figure 2 Only part of the curved pipe image is shown in the figure) is the inner wall surface of a curved pipe, and its contour curve is the black pipe wall edge line.

[0045] S02. Based on the contour curve, obtain the surface characteristics of the target surface at the landing point of the test droplet.

[0046] Furthermore, the surface features described in this embodiment specifically refer to geometric features that can affect the stability of the test droplet behavior. Specifically, the surface features include the angle between the tangent line of the contour curve at the test droplet landing position and the horizontal plane, such as Figure 3 The angle between the midtangent line A and the horizontal line B.

[0047] Figure 3 This is a schematic diagram of an example of the angle between the tangent line of the target surface contour curve at the test droplet falling position and the horizontal plane provided in this embodiment. Figure 3 The target surface is a translucent glass inclined plane. After image processing, the surface in direct contact with the test droplet is represented by the contour represented by the solid line A corresponding to the dotted line A. Since it is an inclined plane, the tangent line at the position where the test droplet falls is also the dotted line A, and is further represented by the solid line A. The angle between it and the image horizontal line B is the surface feature obtained in step S02.

[0048] It can be understood that the angle between the tangent line and the horizontal plane at the position where the test droplet falls is the "instantaneous slope" of the target surface at this point; usually, the reference plane for the behavior of the test droplet is usually the horizontal ground; further, the larger the angle between the tangent line and the horizontal plane, the easier it is for the test droplet to slide.

[0049] Further, in other embodiments, the surface feature includes the curvature of the contour curve at the location where the test droplet falls; Figure 2 The curvature of the middle contour curve C at the location O where the test droplet lands.

[0050] It can be understood that the curvature of the contour curve at the position where the test droplet lands represents the degree of curvature of the target surface at the droplet landing point; further, when the curvature is large, the surface curvature is obvious, and the expansion behavior of the test droplet on the surface will be significantly affected; and when the curvature is small, the test droplet can expand better to form a larger contact area.

[0051] Furthermore, in this embodiment or other embodiments, the surface feature also includes a contact length of the test droplet on the contour curve, and the slope difference and curvature difference between any two points on the contour curve within the contact length do not exceed the corresponding set threshold.

[0052] It is understood that the contactable length refers to the length of the surface that the edge of the test droplet should cover when the test droplet contacts the surface. If the local changes of the surface (such as curvature and inclination) are large, the test droplet may expand irregularly, slide or behave unstable, thus affecting the accuracy of subsequent measurements or injections.

[0053] It is also understandable that by limiting the range of slope differences and curvature differences at different positions within the contactable length, the stability and controllability of the test droplet when it contacts the surface can be ensured, avoiding unstable expansion of the test droplet or deviation from expected behavior due to excessive surface changes.

[0054] It is also understandable that the slope difference threshold and the curvature difference threshold are usually obtained by combining experiments and theoretical models, and are adjusted according to the stability requirements, surface characteristics and application requirements of the test droplet. Usually, empirical values ​​can be used in the initial setting, and further refined adjustments can be made through experiments or optimization methods.

[0055] S03. Obtaining a target injection volume range of the test droplet according to the surface characteristics.

[0056] In this embodiment, based on the angle between the tangent line of the contour curve at the test droplet landing position obtained in step S02 and the horizontal plane, step S03 further comprises the following steps of obtaining the target injection volume range of the test droplet according to the surface features:

[0057] S031a. Obtain a first adjustment amount of the target injection volume according to the size of the included angle.

[0058] Furthermore, the first adjustment amount satisfies the following calculation model: .

[0059] In the calculation model of the first adjustment amount, represents the first adjustment amount, represents the first adjustment coefficient, It represents the angle between the tangent line of the profile curve at the location where the test droplet falls and the horizontal plane.

[0060] Furthermore, the first adjustment coefficient It is used to measure the angle between the tangent line at the droplet falling position and the horizontal plane. Convert to first adjustment The coefficient reflects the effect of surface inclination on the adjustment of the test droplet injection volume; it can be set through experimental measurement, physical model method and relevant experience.

[0061] S032a. Based on the first adjustment amount, obtain a first target injection volume range of the test droplet.

[0062] Furthermore, the first target injection volume range is .

[0063] in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the first adjustment amount.

[0064] It should be noted that as well as Refers to the minimum and maximum basic values ​​set for the test droplet injection volume before considering the influence of surface features (such as angle, curvature, etc.). It is usually obtained based on experimental settings, theoretical analysis or empirical data, and serves as the basic value for subsequent range adjustment.

[0065] In other embodiments, based on the curvature of the contour curve obtained in step S02 at the landing position of the test droplet, the step S03 of obtaining the target injection volume range of the test droplet according to the surface features includes the following steps:

[0066] S031b. Obtain first and second adjustment amounts of the target injection volume according to the size of the curvature.

[0067] Furthermore, the first and second adjustment amounts satisfy the following calculation model: .

[0068] In the calculation model of the first and second adjustment quantities, represents the first and second adjustment amounts, represents the first and second adjustment coefficients, Represents the curvature of the profile curve at the location where the test droplet lands.

[0069] Similarly, the first and second adjustment coefficients It is used to measure the angle between the tangent line at the droplet falling position and the horizontal plane. Convert to first and second adjustment The coefficient reflects the influence of surface curvature on the adjustment of the test droplet injection volume; it can be set through experimental measurement, physical model method and relevant experience.

[0070] S032b. Based on the first and second adjustment amounts, obtain the first and second target injection volume ranges of the test droplet.

[0071] Furthermore, the first and second target injection volume ranges are .

[0072] in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the first and second adjustment amounts.

[0073] In this embodiment or other embodiments, based on the expected contactable length of the test droplet on the contour curve obtained in step S02, step S03 obtains the target injection volume range of the test droplet according to the surface features, and further includes the following steps:

[0074] S033. Obtain a second adjustment amount of the target injection volume according to the contactable length.

[0075] Furthermore, the second adjustment amount satisfies the following calculation model: .

[0076] in, represents the second adjustment amount, represents the second adjustment coefficient, represents the accessible length of the test droplet on the contour curve, represents the contact length threshold of the test droplet on the contour curve.

[0077] Furthermore, the second adjustment coefficient For use according to the accessible length Convert to the second adjustment The coefficient of characterizes the influence of the contact length change on the injection volume of the test droplet; similarly, it can be set through experimental measurement, physical model method and relevant experience.

[0078] S034. Combining the first adjustment amount and the second adjustment amount, obtaining a third target injection volume range of the test droplet, wherein the first adjustment amount is the first-first adjustment amount or the first-second adjustment amount.

[0079] Further, in this embodiment, the step S034 of combining the first adjustment amount and the second adjustment amount to obtain a second target injection volume range of the test droplet includes the following steps:

[0080] S0341a. Based on the first adjustment amount, obtain an adjusted first target injection volume range.

[0081] Further, the adjusted first target injection volume range is .

[0082] S0342a. Based on the second adjustment amount, obtaining an adjusted second target injection volume range;

[0083] Further, the adjusted second target injection volume range is .

[0084] S0343a. Set the intersection of the first target injection volume range and the second target injection volume range as the third target injection volume range for the test droplet.

[0085] Furthermore, the third target injection volume range is ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, represents the first adjustment amount, express and The minimum value in .

[0086] Further, in other embodiments, the step S034 of combining the first and second adjustment amounts with the second adjustment amount to obtain a third target injection volume range of the test droplet includes the following steps:

[0087] S0341b. Based on the first and second adjustment amounts, obtain the adjusted first and second target injection volume ranges.

[0088] Further, the adjusted first and second target injection volume ranges are .

[0089] S0342b. Based on the second adjustment amount, obtaining an adjusted second target injection volume range;

[0090] Further, the adjusted second target injection volume range is .

[0091] S0343b. Set the intersection of the first target injection volume range and the second target injection volume range as the third target injection volume range for the test droplet.

[0092] Furthermore, the third target injection volume range is ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, represents the first and second adjustment amounts, express and The minimum value in .

[0093] S04. Controlling the actual injection volume of the test droplet according to the target injection volume range.

[0094] Further, according to the target injection volume range obtained in step S03, a volume feedback is set to adjust the actual injection volume of the test droplet; that is, during the injection process, a real-time feedback system is used to monitor the volume of the test droplet so that the volume of the test droplet is kept within the target range: if the actual volume of the test droplet is smaller (less than ), the injection volume can be increased by increasing the injection pressure or time; conversely, if the test droplet is too large (exceeding or ), the injection volume needs to be reduced.

[0095] In this embodiment and other embodiments, for the test droplet control method based on the surface features provided in the above embodiments, a computer-readable storage medium is also provided, which includes a stored program; when the program is running, the device where the computer-readable storage medium is located controls some or all of the steps in the above-mentioned test droplet control method based on the surface features.

[0096] In this embodiment and other embodiments, a computer program product is also provided for the test droplet control method based on the surface features provided in the above embodiments, which includes a computer program; when the computer program is executed by a processor, some or all of the steps in the above-mentioned test droplet control method based on surface features are implemented.

[0097] Finally, it should be noted that the aforementioned embodiments are only used to illustrate the technical solution of the present invention rather than to limit it, and the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant description of other embodiments. Although the aforementioned embodiments have described the present invention in detail, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents.

Claims

1. A test droplet control method based on surface features, characterized in that: The steps include: Acquire a side view of the target surface, and extract a contour curve of the target surface in the side view; Based on the contour curve, a contactable length of the test droplet on the contour curve is obtained, the slope difference or curvature difference between any two points on the contour curve within the contactable length does not exceed the corresponding set threshold, and the angle between the tangent line of the contour curve at the test droplet landing position and the horizontal plane is obtained, and the curvature of the contour curve at the test droplet landing position is obtained; When the contactable length and the included angle are obtained based on the contour curve: According to the size of the included angle, a first adjustment amount of the target injection volume is obtained; according to the contactable length, a second adjustment amount of the target injection volume is obtained; based on the first adjustment amount, a first target injection volume range of the test droplet is obtained; based on the second adjustment amount, an adjusted second target injection volume range is obtained; and the intersection of the first target injection volume range and the second target injection volume range is set as a third target injection volume range of the test droplet; When the contactable length and the curvature are obtained based on the contour curve: According to the size of the curvature, the first and second adjustment amounts of the target injection volume are obtained; according to the contactable length, the second adjustment amount of the target injection volume is obtained; based on the first and second adjustment amounts, the first and second target injection volume ranges of the test droplet are obtained; based on the second adjustment amount, the adjusted second target injection volume range is obtained; the intersection of the first and second target injection volume ranges and the second target injection volume range is set as the third target injection volume range of the test droplet; According to the third target injection volume range, the actual injection volume of the test droplet is controlled.

2. The test droplet control method based on surface features according to claim 1, characterized in that: The first adjustment amount satisfies the following calculation model: ,in, represents the first adjustment amount, represents the first adjustment coefficient, It represents the angle between the tangent line of the profile curve at the location where the test droplet falls and the horizontal plane; The first target injection volume range is ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the first adjustment amount.

3. The test droplet control method based on surface features according to claim 1, characterized in that: The first and second adjustment amounts satisfy the following calculation model: ,in, Indicates the first and second adjustment amounts, represents the first and second adjustment coefficients, It represents the curvature of the profile curve at the location where the test droplet lands; The first and second target injection volume ranges are ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the second adjustment amount.

4. The test droplet control method based on surface features according to claim 1, characterized in that: The second adjustment amount satisfies the following calculation model: ,in, represents the second adjustment amount, represents the second adjustment coefficient, represents the accessible length of the test droplet on the contour curve, Indicates the accessible length threshold.

5. The test droplet control method based on surface features according to claim 1, characterized in that: is set to a third target injection volume range for the test droplet, the third target injection volume range being ,in, represents the left endpoint value of the initial target injection volume range, represents the right endpoint value of the initial target injection volume range, Indicates the first adjustment amount or the first second adjustment amount, represents the second adjustment amount, express and The minimum value in .

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the test droplet control method based on surface features described in any one of claims 1 to 4.

7. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the surface feature-based test droplet control method according to any one of claims 1 to 4 is implemented.

Images